Verbal Reasoning - Arithmetic Reasoning

Exercise :: Arithmetic Reasoning - Section 1

11. 

A is 3 years older to B and 3 years younger to C, while B and D are twins. How many years older is C to D?

A. 2
B. 3
C. 6
D. 12

Answer: Option C

Explanation:

Since B and D are twins, so B = D.

Now, A = B + 3 and A = C - 3.

Thus, B + 3 = C - 3 D + 3 = C-3 C - D = 6.


12. 

The 30 members of a club decided to play a badminton singles tournament. Every time a member loses a game he is out of the tournament. There are no ties. What is the minimum number of matches that must be played to determine the winner ?

A. 15
B. 29
C. 61
D. None of these

Answer: Option B

Explanation:

Clearly, every member except one (i.e. the winner) must lose one game to decide the winner. Thus, minimum number of matches to be played = 30 - 1 = 29.


13. 

In a garden, there are 10 rows and 12 columns of mango trees. The distance between the two trees is 2 metres and a distance of one metre is left from all sides of the boundary of the garden. The length of the garden is

A. 20 m
B. 22 m
C. 24 m
D. 26 m

Answer: Option C

Explanation:

Each row contains 12 plants.

There are 11 gapes between the two corner trees (11 x 2) metres and 1 metre on each side is left.

Therefore Length = (22 + 2) m = 24 m.


14. 

12 year old Manick is three times as old as his brother Rahul. How old will Manick be when he is twice as old as Rahul ?

A. 14 years
B. 16 years
C. 18 years
D. 20 years

Answer: Option B

Explanation:

Manick's present age = 12 years, Rahul's present age = 4 years.

Let Manick be twice as old as Rahul after x years from now.

Then, 12 + x = 2 (4 + x) 12 + x = 8 + 2x x = 4.

Hence, Manick's required age = 12 + x = 16 years.


15. 

A tailor had a number of shirt pieces to cut from a roll of fabric. He cut each roll of equal length into 10 pieces. He cut at the rate of 45 cuts a minute. How many rolls would be cut in 24 minutes ?

A. 32 rolls
B. 54 rolls
C. 108 rolls
D. 120 rolls

Answer: Option D

Explanation:

Number of cuts made to cut a roll into 10 pieces = 9.

Therefore Required number of rolls = (45 x 24)/9 = 120.